Water-waste-preventing cistern.



G. GREEN, JR. WATER WASTE PREVENTING GISTERN.

APPLICATION FILED JAN.8,1914.

Patented Aug. 4, 1914.

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C. GREEN, JR. WATER WASTE PREVENTING CISTERN.

APPLICATION FILED JAILB, 191 1.

1,106,141 Patented Aug. 4, 1914.

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v I I a i a Qlallllllg lll/ CHARLES GREEN, JR, OF LONDON, ENGLAND.

WATER-WASTEPREVENTING CISTERN.

To all whom it may concern Be it known that I CHARLES GREEN, Jr.,subject of the King of Great Britain, residing at 21 Northdown street,Kings Cross, London, England, have invented certain new and usefulImprovements in VVater-WVaste- Preventing Cisterns and of which thefollowing is a specification.

This invention relates to that type of flushing cistern which is fittedwith a siphon outlet pipe and which is set in action by forcing air bymeans of a hand-operated compressor through a pipe on to a body of watercontained in a vessel or case within the cistern, so that water iscaused to rise above the siphon bend, the short leg of the siphoncommunicating with the interior of the case.

According to the present invention means are provided in this type offlushing cistern whereby the silent discharge of the water from thecistern is effected, that is the gurgling noise, usually produced on theapproach of the termination of the discharge of water from the cisternis prevented. For this purpose the said case within the cistern is provided with a perpendicular pipe or tube, the upper end of which isarranged so as to be below the normal water level in the cistern,through which pipe, when the water leaves the inlet thereof free, aircan enter, so that before the inlet of water from the cistern to thecase becomes uncovered, air is admitted to the top of the case and theformation of a vacuum in the said case prevented, or the silencing maybe effected or further insured by forming the plunger or piston, bywhich air is forced from the air chamber into the case, of tubularconstruction, the outer end of which piston when in use is closed by thefinger by which the piston is forced inward, while when the finger isremoved, the air chamber through the said piston is opened to theatmosphere, so that air at atmospheric pressure will enter the air tubeand the top of the case, thereby reventing the formation of a vacuum insai case.

The invention will be further described with reference to theaccompanying drawings, whereon,

Figure 1 is a vertical section showing a construction of flushingcistern according to my invention. Fig. 2 is a transverse section of thecistern shown at Fig. 1, and Fig. 3 is a horizontal section of a portionof the cistern taken on the line X-Y of Fig. 2.

Specification of Letters Patent.

Application filed January 8, 1914.

Patented Ang.4, 1914.

Serial No. 811,091.

Fig. 4 is a vertical section on a small scale illustrating a completeinstallation. Fig. 5 is a transverse vertical section, and Fig. 6 afront elevation showing an example of air compressing apparatus.

The flushing cistern 1 is of ordinary character, having a well bottom 9.and fitted with a siphon outlet pipe of a kind which is well known,composed of two legs 3 and 4, the

leg 3 being fixed in an aperture in the base of the cistern. 1

The leg at of the siphon pipe is fitted at its end with what I havetermed a vessel comprising in the construction illustrated an ellipticalcase 5, see particularly Fig. 3, into the top of which the leg 1 of thesiphon enters and extends a short distance. The case 5 is open at itsbase, the diameter of the opening being slightly greater than the boreof the leg 4; of the siphon, and in the construction shown this openingis fitted with a cylindrical ferrule (3, which extends a little abovethe interior surface of. the base of the case 5 and extends for adistance below the base of the said case The cistern 1 is shown fittedwith the usual ball valve 7 or it may be fitted with any convenientwater supply regulating device.

F ixed to the top of the case 5 on one side of the siphon leg 41- andcommunicating with the interior of the said case is an air pipe 8, whichextends above the cistern and is there connected to a pipe which isshown in the gene 'al view at Fig. 4 and marked 9. This extension airpipe passes to some convenient air compressing device, such as is shownat 10, Fig. 4, and an example of construction of which is illustrated atFigs. 5 and 6.

The device at Figs. 5 and 6 consists of a cylinder 11 which communicateswith the extension air pipe 9, and contains a piston 12 having a barrelpiston rod 13 open at its end, and the piston is maintained normally atthe end of the cylinder, as shown at Fig. 5, by a spring such as 14:. Itwill now be observed that the operator can place his thumb on the barrelpiston rod 13, thereby closing the end of the tubular rod, and bypressure forcing the piston clown the cylinder 11 and compressing theair in the air pipe 8. This operation brings the siphon into action, andthe water from the cistern 1 passes down the leg 3 of the siphon, andthe operator, upon removing pressure from the barrel piston rod 13, thepiston is brought back to the position shown at Fig. 5, and air atatmospheric pressure then passes through the barrel piston rod 13,cylinder 11, pipe 9, 8, into the top of the case 5, and thus preventsthe formation of a vacuum in the said case 5 upon the approach of thetermination of the discharge of water from the cistern.

1 have found that the apparatus so constructed is effective andcomparatively silent in operation, but to improve the action as regardsthe degree of silence, which in such apparatus is of very considerableimportance, I attach to the top of the case 5 (or vessel) a pipe 15communicating at its lower end with the interior of the case 5 at thetop part thereof, and extending upward and having its upper end, whichis preferably bent over below the normal water level which is indicatedin the drawings, and I have found that by this addition any noise whichmight occur just before the inlet 6 became uncovered by the waterleaving the cistern entirely prevented. a

What I claim as my invention and desire to secure by Letters Patentis 1. In a flushing cistern of the type specified, the combination of afixed bent siphon pipe within said cistern, said siphon having a longdischarge leg and a short inflow leg, an inner case or vessel fixed atthe lower end of said short leg, said lower end extending through and toa short distance below the top of said inner case, an air pressure pipecommunicating with the interior of and atthe top of said case, means toforce air through said air pressure pipe into said case, and a pipeextending perpendicularly from the top of said case and communicatingwith the interior thereof, the free upper end of this pipe beingnormally closed by water in the cistern.

2. In a flushing cistern of the type specified; the combination with afixed bent siphon pipe within said cistern, said siphon havin a 1ondischar e le and a short inb b b 5 ted to be moved in said chamber tocompress air therein and force air through said air pressure pipe tosaid case, a spring to normally maintain said piston at one end of saidchamber, a hollow piston rod connected to and passing through saidpiston to normally admit air to said chamber, the entrance of airthrough said piston to said chamber being adapted to be stopped by thehand of the operator when moving said piston within said chamber, and apipe extending perpendicularly from the top of said case andcommunicating with the interior thereof, the free upper end of said pipebeing normally closed by water in said cistern. in witness whereof Ihave hereunto set my hand in the presence of two witnesses.

CHARLES GREEN, JUNK.

\Vitnesses Tnonas XV. Rooms, WiLnLmr A. MARSHALL.

Sonics of this patent, may be obtained for five cents each, byaddressing the Commissioner of Patents.

Washington, D. G.

